Handbook for Sound Engineers

1552 Chapter 42 Carrier current system radiation limits are set differ- ently. The radiation from the electrical system must no ...

Assistive Listening Systems 1553 important, as in corporate meeting rooms. For this reason and because of its outstanding sound ...

1554 Chapter 42 The receiving end of the infrared link is a silicon photo diode that is reversed biased and produces current whe ...

Assistive Listening Systems 1555 audio signal onto a subcarrier signal which the emitter converts into infrared light. The recei ...

1556 Chapter 42 with the patron’s T-coil. Most users report a strong pref- erence for the dual earpiece instruments and also rep ...

Assistive Listening Systems 1557 delay can be very distracting to those with less than profound hearing impairments. Battery rep ...

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1559 Chapter 43 Intercoms by Glen Ballou 43.1 General Purpose Intercoms......................................................... ...

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Intercoms 1561 Intercoms, short for intercommunication systems, are often more sophisticated than sound reinforcement systems be ...

1562 Chapter 43 background music or other audio program material to speaker-equipped locations. The Bogen PI35A is designed to m ...

Intercoms 1563 and because the signal is digital, seldom require shielded lines. Matrix systems can control upwards of 256 stati ...

1564 Chapter 43 at each end with a 120: resistor. This keeps a proper impedance of the line. Any door entry system camera should ...

Intercoms 1565 Today there are smart security devices that incorpo- rate the best features of both a listening device and a nois ...

1566 Chapter 43 43.1.5.3 Emergency Crisis Communications Methods of communications change, methods of trans- mission change, and ...

Intercoms 1567 intended receiver is free so he can reinstate the call or the system can automatically recall the receiver. Call ...

1568 Chapter 43 she can transmit a special signal on the conversation channel which tells them there is an important message to ...

Intercoms 1569 retrieved from the foundation of tracer software. The multitasking Microsoft Windows operating system is used, wh ...

1570 Chapter 43 Many intercoms are engineered to receive phantom power from the 24 Vdc system power supply. Stationary or perman ...

Intercoms 1571 box office. The producer and director have access to all four channels. The lighting director is limited to the f ...